Finding the Fourth Proportional to 320.99, 481.09 and 138.17
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Solution
The fourth proportional to 320.99, 481.09 and 138.17 is: 207.08
Step by Step Solution
- Step 1: Write the proportion equation
320.99 : 481.09 = 138.17 : x - Step 2: Convert to fraction form
320.99/481.09 = 138.17/x - Step 3: Cross multiply
320.99x = 481.09 × 138.17 - Step 4: Simplify right side
320.99x = 66,472.21 - Step 5: Solve for x
x = 66,472.21/320.99 - Step 6: Final answer
x = 207.08
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.